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http://dx.doi.org/10.4191/kcers.2012.49.6.528

Effect of the Sintering Temperature and Atmosphere on the Microstructural Evolution and Shrinkage Behavior of CuO Ceramics  

Song, Ju-Hyun (School of Materials Science and Engineering, Kyungpook National University)
Lee, Jung-A (School of Materials Science and Engineering, Kyungpook National University)
Lee, Joon-Hyung (School of Materials Science and Engineering, Kyungpook National University)
Heo, Young-Woo (School of Materials Science and Engineering, Kyungpook National University)
Kim, Jeong-Joo (School of Materials Science and Engineering, Kyungpook National University)
Publication Information
Journal of the Korean Ceramic Society / v.49, no.6, 2012 , pp. 528-534 More about this Journal
Abstract
In this study, the densification behavior and microstructural evolution of CuO were examined when this material was sintered at different temperatures in $O_2$, air and Ar atmospheres. The CuO samples maintained their phases even after prolonged sintering at $900-1100^{\circ}C$ in an oxygen atmosphere. When sintering in air, the densification was faster than it was when sintering in oxygen. However, when the samples were sintered at $1100^{\circ}C$, large pores were observed in the sample due to the phase transformation from CuO to $Cu_2O$ which accompanies the generation of oxygen gas. The pore channels in the sample became narrower as the sintering time increased, eventually undergoing a Rayleigh breakup and forming discrete isolated pores. On the other hand, CuO sintering in Ar did not contribute to the densification, as all CuO samples underwent a phase transformation to $Cu_2O$ during the heating process.
Keywords
CuO; $Cu_2O$; Sintering; Phase transition;
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Times Cited By KSCI : 1  (Citation Analysis)
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